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author | rsc <devnull@localhost> | 2005-07-24 20:15:44 +0000 |
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committer | rsc <devnull@localhost> | 2005-07-24 20:15:44 +0000 |
commit | 23fb2edb22703ad10aae02295e654b3de68617c5 (patch) | |
tree | 68033bae1131e4028eb4a78d4cc028bd2c77839d /src/libventi/file.c | |
parent | 7ba8aa0c7083415ad69c2f8e591425f3c6ebf952 (diff) | |
download | plan9port-23fb2edb22703ad10aae02295e654b3de68617c5.tar.gz plan9port-23fb2edb22703ad10aae02295e654b3de68617c5.tar.bz2 plan9port-23fb2edb22703ad10aae02295e654b3de68617c5.zip |
venti updates
Diffstat (limited to 'src/libventi/file.c')
-rw-r--r-- | src/libventi/file.c | 50 |
1 files changed, 27 insertions, 23 deletions
diff --git a/src/libventi/file.c b/src/libventi/file.c index 89b307c6..9b250114 100644 --- a/src/libventi/file.c +++ b/src/libventi/file.c @@ -18,7 +18,6 @@ #define MaxBlock (1UL<<31) -static char EBadEntry[] = "bad VtEntry"; static char ENotDir[] = "walk in non-directory"; static char ETooBig[] = "file too big"; /* static char EBadAddr[] = "bad address"; */ @@ -49,8 +48,10 @@ vtfilealloc(VtCache *c, VtBlock *b, VtFile *p, u32int offset, int mode) }else epb = p->dsize / VtEntrySize; - if(b->type != VtDirType) - goto Bad; + if(b->type != VtDirType){ + werrstr("bad block type %#uo", b->type); + return nil; + } /* * a non-active entry is the only thing that @@ -58,28 +59,26 @@ vtfilealloc(VtCache *c, VtBlock *b, VtFile *p, u32int offset, int mode) * get prints. */ if(vtentryunpack(&e, b->data, offset % epb) < 0){ - fprint(2, "vtentryunpack failed\n"); - goto Bad; + fprint(2, "vtentryunpack failed: %r (%.*H)\n", VtEntrySize, b->data+VtEntrySize*(offset%epb)); + return nil; } if(!(e.flags & VtEntryActive)){ - if(0)fprint(2, "not active\n"); - goto Bad; - } - if(e.psize < 256 || e.dsize < 256){ - fprint(2, "psize %ud dsize %ud\n", e.psize, e.dsize); - goto Bad; + werrstr("entry not active"); + return nil; } if(DEPTH(e.type) < sizetodepth(e.size, e.psize, e.dsize)){ fprint(2, "depth %ud size %llud psize %ud dsize %ud\n", DEPTH(e.type), e.size, e.psize, e.dsize); - goto Bad; + werrstr("bad depth"); + return nil; } size = vtcacheblocksize(c); if(e.dsize > size || e.psize > size){ - fprint(2, "psize %ud dsize %ud blocksize %ud\n", e.psize, e.dsize, size); - goto Bad; + werrstr("block sizes %ud, %ud bigger than cache block size %ud", + e.psize, e.dsize, size); + return nil; } r = vtmallocz(sizeof(VtFile)); @@ -105,10 +104,6 @@ vtfilealloc(VtCache *c, VtBlock *b, VtFile *p, u32int offset, int mode) r->epb = epb; return r; -Bad: - werrstr(EBadEntry); - return nil; - } VtFile * @@ -178,17 +173,23 @@ vtfileopen(VtFile *r, u32int offset, int mode) return r; } -VtFile * +VtFile* vtfilecreate(VtFile *r, int psize, int dsize, int type) { + return _vtfilecreate(r, -1, psize, dsize, type); +} + +VtFile* +_vtfilecreate(VtFile *r, int o, int psize, int dsize, int type) +{ int i; VtBlock *b; u32int bn, size; VtEntry e; int epb; VtFile *rr; - u32int offset; - + u32int offset; + assert(ISLOCKED(r)); assert(psize <= VtMaxLumpSize); assert(dsize <= VtMaxLumpSize); @@ -205,8 +206,11 @@ vtfilecreate(VtFile *r, int psize, int dsize, int type) /* * look at a random block to see if we can find an empty entry */ - offset = lnrand(size+1); - offset -= offset % epb; + if(o == -1){ + offset = lnrand(size+1); + offset -= offset % epb; + }else + offset = o; /* try the given block and then try the last block */ for(;;){ |